TL;DR
Book early (not the week before), download the audio guide app in advance, arrive 10 minutes before your slot, and spend real time in the museum and crypt. The stained glass direction matters: look east in the morning, west in the afternoon. Add tower access if your budget allows. These small adjustments turn a decent visit into an unforgettable one.
Book tickets the moment you confirm your travel dates
Seriously — not the week before. The best morning slots on popular dates sell out weeks ahead. The 9:00 AM slot on a Saturday in July sells out in days. Book as soon as you know when you're visiting.
Download the audio guide app before you leave your hotel
The Sagrada Família audio guide requires WiFi activation. In the crowded entrance area, mobile data can be slow. Download and test the app on your hotel WiFi the night before.
Arrive 10 minutes before your slot — not early, not late
Arriving 30 minutes early means standing outside. Arriving late means a stressful scramble. 10 minutes early is perfect. Have your QR code ticket ready on your phone before you reach the gate.
Look east in the morning, west in the afternoon
The stained glass is directional. The east-facing blue and green glass is spectacular in morning light (9:00–11:00 AM). The west-facing red and amber glass transforms the nave in afternoon light (3:00–6:00 PM). Plan your slot accordingly.
Don't just look up — look close
The Nativity façade sculptures contain hundreds of individual animals, plants, and figures that most visitors walk past at 3 metres distance. Get close. Look for the chameleon, the tortoise, the pelican feeding its chicks, the trumpet-playing angels.
Spend time in the museum — most people rush past
The museum at the base of the building contains Gaudí's original design models and hanging chain structural tests. For anyone interested in architecture or engineering, the museum is as interesting as the building itself. Budget 20–25 minutes.
Visit the crypt even if you're not religious
Gaudí spent 43 years of his life creating this building and is buried here. The simplicity of the tomb is moving in contrast to the exuberance above. The crypt also has the oldest part of the building (1880s) for architectural contrast.
Go up the tower if you can
Tower access costs around €10 extra and is absolutely worth it. The view of the city from 65 metres, the close-up detail of the stone at tower level, and the spiral staircase descent through the tower interior are experiences you can't get otherwise.